(https://americanlongrifles.org/forum/proxy.php?request=http%3A%2F%2Fpreview.ibb.co%2FdnfL9F%2FP1010080.jpg&hash=d0722c4192060ecfe059fc27d4577ff6859affbd) (http://ibb.co/c0NYUF)
The second rifle from the top in the above photo has an L & R Balies lock. Back in 2005 I came across an old Gillespie barrel with the dolls head tang still in it, so I built a rifle for one of my Gillespie family cousins. I am not sure (too long ago) but I think the lock in the top rifle is a Cochran, I remember I had to do a lot of work on it including bushing the tumbler shaft!
(https://americanlongrifles.org/forum/proxy.php?request=http%3A%2F%2Fpreview.ibb.co%2FbUjQbv%2FP1010073.jpg&hash=792366fbf59c93e79c514a8f5ce90ba26052628d) (http://ibb.co/bM1SpF)
Same rifle with the Balies lock (top rifle) you can get a look at the original tang that was in this barrel. Its shaped like a few other Gillespie tangs but not all of theirs looked like this on.